![](https://webarchive.library.unt.edu/eot2008/20090514051848im_/http://www.cancer.gov/images/spacer.gif) |
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(ob-tun-DAY-shun)
![](https://webarchive.library.unt.edu/eot2008/20090514051848im_/http://www.cancer.gov/images/spacer.gif)
| A dulled or reduced level of alertness or consciousness. |
Previous Definitions: | oblimersen, observation, observational study, obsessive-compulsive disorder, obstruction | Next Definitions: | occult primary tumor, occult stage non-small cell lung cancer, occupational therapist, OCT, octreotide |
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![](https://webarchive.library.unt.edu/eot2008/20090514051848im_/http://www.cancer.gov/images/spacer.gif) |